package soot.jimple.toolkits.scalar;

/*-
 * #%L
 * Soot - a J*va Optimization Framework
 * %%
 * Copyright (C) 2004 Jennifer Lhotak 
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 2.1 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-2.1.html>.
 * #L%
 */

import soot.SideEffectTester;
import soot.SootMethod;
import soot.Unit;
import soot.Value;
import soot.toolkits.graph.DirectedGraph;
import soot.toolkits.scalar.FlowSet;

/**
 * Implements an available expressions analysis on local variables. pessimistic analysis - for teaching 621
 */
public class PessimisticAvailableExpressionsAnalysis extends SlowAvailableExpressionsAnalysis {
  public PessimisticAvailableExpressionsAnalysis(DirectedGraph<Unit> dg, SootMethod m, SideEffectTester st) {
    super(dg);
  }

  protected FlowSet<Value> newInitialFlow() {
    FlowSet<Value> newSet = emptySet.clone();
    // ((ToppedSet)newSet).setTop(true);
    return newSet;
  }

}
